The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 19, 2017
Filed:
Aug. 11, 2016
Applicant:
United Therapeutics Corporation, Silver Spring, MD (US);
Inventors:
Hitesh Batra, Herndon, VA (US);
Liang Guo, Vienna, VA (US);
Assignee:
United Therapeutics Corporation, Silver Spring, MD (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D 307/93 (2006.01);
U.S. Cl.
CPC ...
C07D 307/93 (2013.01);
Abstract
A method is described for making single isomers of synthetic beraprost diol, a key intermediate for making 314-d isomer of beraprost. The method requires fewer steps than the known methods for making these compounds and can be used to scale up the reaction more easily to produce commercial quantities.